Re the Keele scoring, that's raising the same issue about deciles that was going on somewhere else (can't remember if it was this thread).
The top quintile is the top two deciles. If you look on the UCAT pages at the interim boundaries you see the table below.
So if these were the final boundaries the quintile thresholds would be 2,850 (between top and 2nd quintile), 2,660 (between 2nd and 3rd quintiles), 2,500 (between 3rd and fourth quintiles) and 2,320 (between 4th and bottom quintiles.
The confusion arises because (a) Keele are counting quintiles from top to bottom rather than bottom to top and (b) UCAT show 9 decile boundaries rather than 10 decile ranges. For the interim data on the web site, these would be the ranges:
1st decile: 1,200-2,180
2nd decile: 2,190-2,320
3rd decile: 2,330-2,420
4th decile: 2,430-2,500
5th decile: 2,510-2,580
6th decile: 2,590-2,660
7th decile: 2,670-2,740
8th decile: 2,750-2,850
9th decile: 2,860-2,990
10th decile: 3,000-3,600
Hard to believe 10% of test-takers are scoring 3,000+, but it must be so.